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Finding the Fourth Proportional to 392,339.70, 588,509.55 and 303,766.20

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Solution

The fourth proportional to 392,339.70, 588,509.55 and 303,766.20 is: 455,649.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,339.70 : 588,509.55 = 303,766.20 : x
  2. Step 2: Convert to fraction form
    392,339.70/588,509.55 = 303,766.20/x
  3. Step 3: Cross multiply
    392,339.70x = 588,509.55 × 303,766.20
  4. Step 4: Simplify right side
    392,339.70x = 178,769,309,667.21
  5. Step 5: Solve for x
    x = 178,769,309,667.21/392,339.70
  6. Step 6: Final answer
    x = 455,649.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.